Construction 70s house

[EnisP]

Hello everyone.

What do you think of this construction method for a 1970s house?

# Foundation:
surface layer
40 concrete screed
60 cellular plastic
100 structural concrete
150 gravel fill

# Exterior wall from the outside:
brick
20 air gap
70 mineral wool
150 aerated concrete

# Interior wall:
150 aerated concrete, resting on the structural concrete

# Floor structure from the top:
surface layer
chipboard
200 insulation
battens
gypsum board with vapor barrier

# Roof structure from the top:
concrete tiles
25x38 battens
19x25 counter battens (pressure-treated)
felt yal 1200/325
17 rough boards
50 air space
2x50 min wool
50 min wool
gypsum board with vapor barrier

 

[fahlis]

Not much to like, very common building style at the specified time...

 

[falkn]

A common construction. Quite sturdy and with few problem areas. However, the roof will likely need to be redone in the next few years like all houses from that time.

 

[EnisP]

Hi,
Thank you for your responses.
What are the most common problems with such a house?
Can you get moisture problems from the ground up to the lättbetong walls? Do they absorb moisture?

 

[mexitegel]

If there are no problems after 50 years, it is unlikely that any would arise now as long as the conditions do not change.

 

[EnisP]

Yes, very logical
Possibly the first house, so one is a bit extra concerned since one has read a lot about moisture problems with wooden houses.
The only wood on the ground floor is 2 glulam pillars that are probably on K-concrete but there should be paper between the wood and concrete, at least according to the plan.

 

[GoC]

There are likely new problems with that construction.
The only issue in that case is if the aerated concrete is blue Ytong, with well-known problems related to it emitting radon.
But that's easy to check.
Otherwise, it seems solid.

 

[EnisP]

Hello.
I've been thinking about blue concrete.
However, the owner conducted a radon measurement in 2008.
The value was 30 bq/m3 on both the ground floor and the upper floor.
Shouldn't that rule out blue concrete? Or should the walls still be checked with a gamma radiation meter?